code: def _f() -> None:
      ...
  
file_path: dask/dask/order.py
imports: from __future__ import annotations
  import copy
  from collections import defaultdict, deque, namedtuple
  from collections.abc import Iterable, Mapping, MutableMapping
  from typing import Any, Callable, Literal, NamedTuple, overload
  from dask.core import get_dependencies, get_deps, getcycle, istask, reverse_dict
  from dask.typing import Key
label_desc: Use image node_id 7 for calling a global function with example usage: _f() without return types